[REN-BGP-stats-all] IPv4 R&E Routing Table Report - TENET (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Thu Jul 17 18:30:39 UTC 2025
IPv4 R&E Routing Table Report 18:30 GMT Thu 17 Jul, 2025
IPv4 BGP Table (R&E) as seen at TENET.
Report Website: https://bgp.nsrc.org/REN
Detailed Analysis: https://bgp.nsrc.org/REN/TENET/
Analysis Summary
----------------
BGP routing table entries examined: 16345
Prefixes after maximum aggregation (per Origin AS): 8571
Deaggregation factor: 1.91
Unique aggregates announced (without unneeded subnets): 9741
Number of IPv4 prefixes with a valid ROA: 6440
Number of IPv4 prefixes with an invalid ROA: 8
Number of IPv4 prefixes with no ROA: 9897
Total ASes present in the Internet Routing Table: 2365
Prefixes per ASN: 6.91
Origin-only ASes present in the Internet Routing Table: 2064
Origin ASes announcing only one prefix: 901
Transit ASes present in the Internet Routing Table: 301
Transit-only ASes present in the Internet Routing Table: 58
Paths with bogon ASNs present in the IPv4 Routing Table: 0
Average AS path length visible in the Internet Routing Table: 4.4
Max AS path length visible: 18
Max AS path prepend of ASN (395156) 12
Prefixes from unregistered ASNs in the Routing Table: 33
Number of instances of unregistered ASNs: 33
Number of 32-bit ASNs allocated by the RIRs: 46856
Number of 32-bit ASNs visible in the Routing Table: 614
Prefixes from 32-bit ASNs in the Routing Table: 1631
Number of bogon 32-bit ASNs visible in the Routing Table: 0
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 3
Number of addresses announced to Internet: 158748672
Equivalent to 9 /8s, 118 /16s and 80 /24s
Percentage of available address space announced: 4.3
Percentage of allocated address space announced: 4.3
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 99.6
Total number of prefixes smaller than registry allocations: 1813
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 4840
Total APNIC prefixes after maximum aggregation: 2341
APNIC Deaggregation factor: 2.07
Prefixes being announced from the APNIC address blocks: 4838
Unique aggregates announced from the APNIC address blocks: 2682
APNIC Region origin ASes present in the Internet Routing Table: 601
APNIC Prefixes per ASN: 8.05
APNIC Region origin ASes announcing only one prefix: 254
APNIC Region transit ASes present in the Internet Routing Table: 52
Average APNIC Region AS path length visible: 5.0
Max APNIC Region AS path length visible: 14
Number of APNIC region 32-bit ASNs visible in the Routing Table: 246
Number of APNIC addresses announced to Internet: 45373184
Equivalent to 2 /8s, 180 /16s and 87 /24s
APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 63488-64098, 64297-64395, 131072-155961
APNIC Address Blocks 1/8, 14/8, 27/8, 36/8, 39/8, 42/8, 43/8,
49/8, 58/8, 59/8, 60/8, 61/8, 101/8, 103/8,
106/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8,
116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8,
123/8, 124/8, 125/8, 126/8, 133/8, 150/8, 153/8,
163/8, 171/8, 175/8, 180/8, 182/8, 183/8, 202/8,
203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8,
222/8, 223/8,
ARIN Region Analysis Summary
----------------------------
Prefixes being announced by ARIN Region ASes: 8007
Total ARIN prefixes after maximum aggregation: 4805
ARIN Deaggregation factor: 1.67
Prefixes being announced from the ARIN address blocks: 8052
Unique aggregates announced from the ARIN address blocks: 5382
ARIN Region origin ASes present in the Internet Routing Table: 1269
ARIN Prefixes per ASN: 6.35
ARIN Region origin ASes announcing only one prefix: 442
ARIN Region transit ASes present in the Internet Routing Table: 155
Average ARIN Region AS path length visible: 4.3
Max ARIN Region AS path length visible: 15
Number of ARIN region 32-bit ASNs visible in the Routing Table: 214
Number of ARIN addresses announced to Internet: 92107264
Equivalent to 5 /8s, 125 /16s and 114 /24s
ARIN AS Blocks 1-1876, 1902-2042, 2044-2046, 2048-2106
(pre-ERX allocations) 2138-2584, 2615-2772, 2823-2829, 2880-3153
3354-4607, 4865-5119, 5632-6655, 6912-7466
7723-8191, 10240-12287, 13312-15359, 16384-17407
18432-20479, 21504-23551, 25600-26591,
26624-27647, 29696-30719, 31744-33791
35840-36863, 39936-40959, 46080-47103
53248-55295, 62464-63487, 64198-64296, 393216-402332
ARIN Address Blocks 3/8, 4/8, 6/8, 7/8, 8/8, 9/8, 11/8,
12/8, 13/8, 15/8, 16/8, 17/8, 18/8, 19/8,
20/8, 21/8, 22/8, 23/8, 24/8, 26/8, 28/8,
29/8, 30/8, 32/8, 33/8, 34/8, 35/8, 38/8,
40/8, 44/8, 45/8, 47/8, 48/8, 50/8, 52/8,
54/8, 55/8, 56/8, 63/8, 64/8, 65/8, 66/8,
67/8, 68/8, 69/8, 70/8, 71/8, 72/8, 73/8,
74/8, 75/8, 76/8, 96/8, 97/8, 98/8, 99/8,
100/8, 104/8, 107/8, 108/8, 128/8, 129/8, 130/8,
131/8, 132/8, 134/8, 135/8, 136/8, 137/8, 138/8,
139/8, 140/8, 142/8, 143/8, 144/8, 146/8, 147/8,
148/8, 149/8, 152/8, 155/8, 156/8, 157/8, 158/8,
159/8, 160/8, 161/8, 162/8, 164/8, 165/8, 166/8,
167/8, 168/8, 169/8, 170/8, 172/8, 173/8, 174/8,
184/8, 192/8, 198/8, 199/8, 204/8, 205/8, 206/8,
207/8, 208/8, 209/8, 214/8, 215/8, 216/8,
RIPE Region Analysis Summary
----------------------------
Prefixes being announced by RIPE Region ASes: 1037
Total RIPE prefixes after maximum aggregation: 760
RIPE Deaggregation factor: 1.36
Prefixes being announced from the RIPE address blocks: 1028
Unique aggregates announced from the RIPE address blocks: 808
RIPE Region origin ASes present in the Internet Routing Table: 249
RIPE Prefixes per ASN: 4.13
RIPE Region origin ASes announcing only one prefix: 120
RIPE Region transit ASes present in the Internet Routing Table: 38
Average RIPE Region AS path length visible: 4.0
Max RIPE Region AS path length visible: 10
Number of RIPE region 32-bit ASNs visible in the Routing Table: 56
Number of RIPE addresses announced to Internet: 14752256
Equivalent to 0 /8s, 225 /16s and 26 /24s
RIPE AS Blocks 1877-1901, 2043, 2047, 2107-2136, 2585-2614
(pre-ERX allocations) 2773-2822, 2830-2879, 3154-3353, 5377-5631
6656-6911, 8192-9215, 12288-13311, 15360-16383
20480-21503, 24576-25599, 28672-29695
30720-31743, 33792-35839, 38912-39935
40960-45055, 47104-52223, 56320-58367
59392-61439, 61952-62463, 64396-64495
196608-216475
RIPE Address Blocks 2/8, 5/8, 25/8, 31/8, 37/8, 46/8, 51/8,
53/8, 57/8, 62/8, 77/8, 78/8, 79/8, 80/8,
81/8, 82/8, 83/8, 84/8, 85/8, 86/8, 87/8,
88/8, 89/8, 90/8, 91/8, 92/8, 93/8, 94/8,
95/8, 109/8, 141/8, 145/8, 151/8, 176/8, 178/8,
185/8, 188/8, 193/8, 194/8, 195/8, 212/8, 213/8,
217/8,
LACNIC Region Analysis Summary
------------------------------
Prefixes being announced by LACNIC Region ASes: 1274
Total LACNIC prefixes after maximum aggregation: 496
LACNIC Deaggregation factor: 2.57
Prefixes being announced from the LACNIC address blocks: 1271
Unique aggregates announced from the LACNIC address blocks: 665
LACNIC Region origin ASes present in the Internet Routing Table: 135
LACNIC Prefixes per ASN: 9.41
LACNIC Region origin ASes announcing only one prefix: 57
LACNIC Region transit ASes present in the Internet Routing Table: 26
Average LACNIC Region AS path length visible: 4.5
Max LACNIC Region AS path length visible: 14
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 63
Number of LACNIC addresses announced to Internet: 4073216
Equivalent to 0 /8s, 62 /16s and 39 /24s
LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
61440-61951, 64099-64197, 262144-274844 + ERX transfers
LACNIC Address Blocks 177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8,
191/8, 200/8, 201/8,
AfriNIC Region Analysis Summary
-------------------------------
Prefixes being announced by AfriNIC Region ASes: 1154
Total AfriNIC prefixes after maximum aggregation: 164
AfriNIC Deaggregation factor: 7.04
Prefixes being announced from the AfriNIC address blocks: 1153
Unique aggregates announced from the AfriNIC address blocks: 201
AfriNIC Region origin ASes present in the Internet Routing Table: 51
AfriNIC Prefixes per ASN: 22.61
AfriNIC Region origin ASes announcing only one prefix: 28
AfriNIC Region transit ASes present in the Internet Routing Table: 11
Average AfriNIC Region AS path length visible: 2.5
Max AfriNIC Region AS path length visible: 18
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 35
Number of AfriNIC addresses announced to Internet: 2440192
Equivalent to 0 /8s, 37 /16s and 60 /24s
AfriNIC AS Blocks 36864-37887, 327680-329727 & ERX transfers
AfriNIC Address Blocks 41/8, 102/8, 105/8, 154/8, 196/8, 197/8,
APNIC Region per AS prefix count summary
----------------------------------------
ASN No of nets /20 equiv MaxAgg Description
2907 601 2169 462 SINET-AS Research Organization of Informa
7497 453 180 23 CSTNET-AS-AP Computer Network Information
4538 197 4192 72 ERX-CERNET-BKB China Education and Resear
1237 194 74 146 KREONET-AS-KR KISTI, KR
58647 182 18 2 KAGAWAU-AS Kagawa University, JP
7575 171 281 116 AARNET-AS-AP Australian Academic and Rese
55824 148 19 21 NKN-CORE-NW NKN Core Network, IN
4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha
4621 67 37 9 UNINET-AS-AP UNINET-, TH
6262 63 134 56 CSIRO Commonwealth Scientific and Industr
Complete listing at https://bgp.nsrc.org/REN/TENET/data-ASnet-APNIC
ARIN Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
668 210 648 179 DNIC-AS-00668, US
5786 199 16 1 UPRENET, PR
376 198 162 148 RISQ-AS, CA
2920 176 34 7 LACOE, US
270 159 345 89 AS270, US
2152 146 491 96 CENIC-2152, US
18558 139 18 4 NETBLK-RCOEK, US
81 127 471 35 NCREN, US
23024 99 7 17 OCDE, US
21976 90 34 16 NJEDGE-NET, US
Complete listing at https://bgp.nsrc.org/REN/TENET/data-ASnet-ARIN
RIPE Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
8895 109 24 5 ISU Internet Services Unit ISU, SA
1103 99 1759 85 SURFNET-NL SURFnet, The Netherlands, NL
3267 80 29 69 NIKS, RU
1653 51 150 48 SUNET SUNET Swedish University Network, E
1741 39 149 18 FUNETAS, FI
3218 34 3 22 COSMOS-3218-AS AS-COSMOS root, RU
224 16 257 16 UNINETT UNINETT, The Norwegian University
8674 16 2 11 NETNOD-IX Netnod AB, SE
1880 14 1 7 STUPI, SE
8508 14 39 8 SILWEB-AS-EDU SILWEB Autonomous System -
Complete listing at https://bgp.nsrc.org/REN/TENET/data-ASnet-RIPE
LACNIC Region per AS prefix count summary
-----------------------------------------
ASN No of nets /20 equiv MaxAgg Description
1916 240 177 41 Rede Nacional de Ensino e Pesquisa, BR
28391 159 10 71 Universidad Juarez Autonoma de Tabasco, M
11340 110 25 52 Red Universitaria Nacional, CL
271640 68 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR
2715 53 100 36 Fundacao Carlos Chagas Filho de Amparo a
61468 52 3 21 CEDIA, EC
19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR
28614 38 2 2 Fundacao Universidade Regional de Blumena
1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S
3596 37 8 4 Universidad Autonoma Metropolitana, MX
Complete listing at https://bgp.nsrc.org/REN/TENET/data-ASnet-LACNIC
AfriNIC Region per AS prefix count summary
------------------------------------------
ASN No of nets /20 equiv MaxAgg Description
36914 572 82 3 KENET-AS, KE
2018 375 318 69 TENET-1, ZA
8094 47 48 18 PUKNET, ZA
37215 37 8 1 MAREN, MW
37501 11 49 6 UOFS, ZA
327700 11 16 1 MoRENet, MZ
37654 10 1 6 RwEdNet-AS, RW
36982 8 33 8 UCT, ZA
327947 8 4 1 KNUST-, GH
37661 6 6 3 NRaE1-AS, NG
Complete listing at https://bgp.nsrc.org/REN/TENET/data-ASnet-AFRINIC
Global Per AS prefix count summary
----------------------------------
ASN No of nets /20 equiv MaxAgg Description
2907 601 2169 462 SINET-AS Research Organization of Informa
36914 572 82 3 KENET-AS, KE
7497 453 180 23 CSTNET-AS-AP Computer Network Information
2018 375 318 69 TENET-1, ZA
1916 240 177 41 Rede Nacional de Ensino e Pesquisa, BR
668 210 648 179 DNIC-AS-00668, US
5786 199 16 1 UPRENET, PR
376 198 162 148 RISQ-AS, CA
4538 197 4192 72 ERX-CERNET-BKB China Education and Resear
1237 194 74 146 KREONET-AS-KR KISTI, KR
Complete listing at https://bgp.nsrc.org/REN/TENET/data-ASnet
Global Per AS Maximum Aggregation summary
-----------------------------------------
ASN No of nets Net Savings Description
36914 572 569 KENET-AS, KE
7497 453 430 CSTNET-AS-AP Computer Network Information Cente
2018 375 306 TENET-1, ZA
1916 240 199 Rede Nacional de Ensino e Pesquisa, BR
5786 199 198 UPRENET, PR
58647 182 180 KAGAWAU-AS Kagawa University, JP
2920 176 169 LACOE, US
18558 139 135 NETBLK-RCOEK, US
55824 148 127 NKN-CORE-NW NKN Core Network, IN
4538 197 125 ERX-CERNET-BKB China Education and Research Net
Complete listing at https://bgp.nsrc.org/REN/TENET/data-CIDRnet
List of Unregistered Origin ASNs (Global)
-----------------------------------------
Bad AS Designation Net Originated Transit AS Transit AS Name
26971 UNALLOCATED 129.111.0.0/16 276 OTS-AS-276, US
26898 UNALLOCATED 131.187.248.0/22 3112 OARNET-AS-1, US
26898 UNALLOCATED 131.187.248.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 131.187.249.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 131.187.250.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 131.187.251.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 198.30.187.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 208.108.80.0/20 3112 OARNET-AS-1, US
26898 UNALLOCATED 208.108.80.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 208.108.81.0/24 3112 OARNET-AS-1, US
Complete listing at https://bgp.nsrc.org/REN/TENET/data-badAS
Advertised Unallocated Addresses
--------------------------------
Unassigned Network ASN Information AS Name
164.160.192.0/21 Origin: 37661 NRaE1-AS, NG
164.160.192.0/21 Transit: 37288 WACREN, SN
202.14.117.0/24 Origin: 17827 STOU-AS-TH Sukhothai Thammathirat Open U
202.14.117.0/24 Transit: 4621 UNINET-AS-AP UNINET-, TH
203.9.156.0/24 Origin: 1851 ADELAIDE-UNIVERSITY-AS-AP The University
203.9.156.0/24 Transit: 7575 AARNET-AS-AP Australian Academic and Res
Complete listing at https://bgp.nsrc.org/REN/TENET/data-add-IANA
Number of prefixes announced per prefix length (Global)
-------------------------------------------------------
/1:0 /2:0 /3:0 /4:0 /5:0 /6:0
/7:0 /8:0 /9:1 /10:1 /11:1 /12:10
/13:17 /14:30 /15:87 /16:1472 /17:367 /18:423
/19:510 /20:761 /21:721 /22:1140 /23:1290 /24:9514
/25:0 /26:0 /27:0 /28:0 /29:0 /30:0
/31:0 /32:0
Advertised prefixes smaller than registry allocations
-----------------------------------------------------
ASN No of nets Total ann. Description
36914 548 572 KENET-AS, KE
8895 106 109 ISU Internet Services Unit ISU, SA
23024 38 99 OCDE, US
3267 35 80 NIKS, RU
28614 32 38 Fundacao Universidade Regional de Blumenau, BR
46115 32 35 LUTHER, US
37215 31 37 MAREN, MW
25977 30 44 HCCS, US
27609 29 45 USC-UNIVERSITY-HOSPITAL, US
40326 29 33 ECKERD-COLLEGE, US
Complete listing at https://bgp.nsrc.org/REN/TENET/data-sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
1:2 4:2 5:1 6:4 8:2 12:2
14:93 23:10 24:3 35:10 37:1 38:11
40:1 41:225 42:18 44:4 45:43 47:1
49:12 50:2 52:1 58:16 59:20 60:6
61:3 62:3 63:32 64:43 65:5 66:43
67:39 68:12 69:17 70:2 71:1 72:8
74:50 76:15 77:7 80:4 81:1 82:3
83:2 84:2 85:20 86:6 87:1 89:2
91:14 92:2 93:1 96:5 97:1 98:2
101:3 102:11 103:363 104:72 108:10 109:5
110:1 111:21 113:1 114:21 116:8 117:61
118:34 119:31 121:28 122:8 123:8 124:42
125:5 128:57 129:33 130:96 131:58 132:68
133:156 134:109 136:200 137:48 138:10 139:5
140:31 141:4 142:26 143:25 144:25 146:135
147:51 148:200 149:10 150:37 151:8 152:137
153:3 154:43 155:85 156:132 157:25 158:26
159:116 160:34 161:17 162:24 163:78 164:10
165:43 167:12 168:73 169:8 170:17 171:1
172:1 173:6 175:16 177:5 179:13 180:16
181:1 182:12 184:6 185:18 186:4 187:24
188:4 189:2 190:17 191:13 192:1113 193:72
194:58 195:9 196:148 197:355 198:455 199:279
200:304 201:23 202:629 203:438 204:370 205:134
206:205 207:220 208:64 209:117 210:222 211:4
212:119 213:1 214:9 216:93 217:4 218:23
219:7 220:16 222:4 223:16
End of report
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